Liquefied air separation FAQ

The oxygen piping of liquid air separation plant has the following characteristics: One, high oxygen purity, the purity of oxygen produced by the liquid air separation plant ≥ 99.6%. Two, is the oxygen transport pipeline pressure, high pressure oxygen operating pressure at 8.77MPa. Third, is with the general characteristics of gas piping, the local airflow speed is fast, reaching 200 m / s. According to the characteristics of the oxygen pipeline requires that The appearance of the pipe...

Liquid air separation plant liquid hub area piping arrangement is mainly oxygen, nitrogen, argon liquid pipeline and pump box in the liquid pipeline arrangement. As oxygen, nitrogen, argon liquid temperature is extremely low (liquid oxygen -183 ° C ℃, liquid nitrogen -196 ° C, argon liquid -185.7C), in the liquid flow process, resulting in a certain amount of gasification, piping should pay attention to the slope of the liquid pipeline towards (no slope requirements on the process). In ...

Liquid air separation plant piston compressor clearance volume is: the compressor at the end of the exhaust, the piston and the cylinder end of the wall between the residual part of the high pressure gas occupied by the cylinder volume. The existence of the residual volume directly reduces the exhaust volume of the compressor, at the same time, the suction of this part of the high pressure gas expansion, will also cause a delay in the suction process, the reduction in suction volume, ultimately ...

Liquid air separation plants save the investment and electricity consumption of seawater gasifiers, pumps or combustion vaporisers, and also allow access to liquefied air. The liquefied air is stored in a storage tank and then continuously transported into the liquid air separation plants via a liquid pump or vapour boosting to replenish the cooling capacity and ensure continuous operation of the air separation unit. The use of circulating nitrogen (or air) to absorb the cold at the low temperat...

Conventional liquid air separation plants are cooled by isothermal throttling refrigeration and expander refrigeration, LNG cold energy air separation eliminates the need for an expander and utilises the cooling capacity of LNG and isothermal throttling refrigeration. The air separation unit uses circulating nitrogen gas to liquefy into liquid nitrogen in a liquefier, which is fed into the lower tower, where the cold is transferred to the distillation system to pump the dirty liquid nitrogen thr...

A low pressure nitrogen expander is added to the process design. The pressure nitrogen from the pressure tower and high pressure expander is expanded into low pressure nitrogen, which is combined with the nitrogen coming from the low pressure tower and fed into the charge gas compressor. This is specially set up for rapid oxygen load changes. The oxygen product flow rate during normal operation corresponds to the amount of oxygen contained in the amount of air entering the air separation unit. T...